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Research Papers

Selection of Materials and Design of Multilayer Lightweight Passive Thermal Protection System

[+] Author and Article Information
Sachin Kumar

School of Engineering,
Indian Institute of Technology Mandi,
Mandi 175001, Himachal Pradesh, India

Shripad P. Mahulikar

Professor
Department of Aerospace Engineering,
Indian Institute of Technology Bombay,
P.O. IIT Powai,
Mumbai 400076, Maharashtra, India
e-mail: spm@aero.iitb.ac.in

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received June 1, 2015; final manuscript received September 16, 2015; published online November 17, 2015. Assoc. Editor: Hongbin Ma.

J. Thermal Sci. Eng. Appl 8(2), 021003 (Nov 17, 2015) (9 pages) Paper No: TSEA-15-1156; doi: 10.1115/1.4031737 History: Received June 01, 2015; Revised September 16, 2015

A methodology has been established aiming to design a lightweight thermal protection system (TPS), using advanced lightweight ablative materials developed at the NASA Ames Research Center. An explicit finite-difference scheme is presented for the analysis of one-dimensional transient heat transfer in a multilayer TPS. This problem is solved in two steps, in the first step, best candidate materials are selected for TPS. The selection of materials is based mainly on their thermal properties. In the second step, the geometrical dimensions are determined by using an explicit finite-difference scheme for different combinations of the selected materials, and these dimensions are optimized for the design of lightweight TPS. The best combination of material employs silicone impregnated reusable ceramic ablator (SIRCA), Saffil, and glass-wool for the first, second, and third layer, respectively.

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References

Figures

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Fig. 1

A simplified model of TPS

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Fig. 2

Incident heat flux (stage 1) and convection coefficient (stage 2) profile with time on the TPS surface

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Fig. 3

First insulation layer materials, satisfying the constraints in Eq. (1)

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Fig. 4

Two-layer finite-difference model of TPS

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Fig. 5

Material interface node

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Fig. 6

(a) Radiation equilibrium temperature profile for PICA, (b) temperature profiles along the thickness direction comprising of PICA and Saffil, and (c) temperature profiles of contact surface temperature T1 and bottom surface temperature T2 comprising of PICA and Saffil

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Fig. 7

(a) Temperature profiles along the thickness direction comprising of PICA and Q-fiber and (b) temperature profiles of contact surface temperature T1 and bottom surface temperature T2 comprising of PICA and Q-fiber

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Fig. 8

Temperature profiles along the thickness direction comprising of PICA and carbon foam

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Fig. 9

Temperature profiles along the thickness direction comprising of PICA and graphite foam

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Fig. 10

Temperature profiles along the thickness direction comprising of PICA and glass-wool

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Fig. 11

(a) Radiation equilibrium temperature profile for SIRCA, (b) temperature profiles of contact surface temperature T1 and bottom surface temperature T2 comprising of SIRCA and Saffil, and (c) temperature profiles along the thickness direction comprising of SIRCA and Saffil

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Fig. 12

Temperature profiles along the thickness direction comprising of (a) SIRCA and Q-fiber, (b) SIRCA and carbon foam, (c) SIRCA and graphite foam, and (d) SIRCA and glass-wool

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Fig. 13

(a) Temperature profiles of contact surface temperatures T1, T2, and bottom surface temperature T3 comprising of SIRCA, Saffil, and glass-wool and (b) temperature profiles along the thickness direction comprising of SIRCA, Saffil, and glass-wool

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